/Engine/Source/Editor/AnimationBlueprintLibrary/Public/AnimationBlueprintLibrary.h
Removes All Animation Sync Marker found within the Animation Sequence whose name matches MarkerName, and returns the number of removed instances
static int32 RemoveAnimationSyncMarkersByName ( [UAnimSequence](API\Runtime\Engine\Animation\UAnimSequence) * AnimationSequence, [FName](API\Runtime\Core\UObject\FName) MarkerName )